An　improved　header　configuration　with　perforated　wing　panels　was　proposed　to　be　installed　in　patefin　heat　exchangers　in　order　to　improve　thermal　performance.　The　fluid　flow　distribution,　power　consumption,　and　effectiveness　degradation　due　to　the　header　configuration　in　conventional　and　improved　headers　were　calculated　and　analyzed.　The　results　showed　that　the　fluid　flow　maldistribution　is　very　serious　in　conventional　headers,　where　the　outlet　velocity　decreases　gradually　along　the　edge　of　the　header,　while　the　perforated　wing-panel　header　configuration　can　effectively　improve　the　uniformity　of　the　fluid　flow　distribution,　in　which　the　outlet　velocity　at　the　center　and　edge　is　almost　equal.　In　addition,　it　was　found　that　when　the　wing　relative　height　was　gamma　-　0.1,　the　wing　space　ratio　was　beta　=　0.1,　and　the　wing　angle　was　alpha　=　70.,　the　comprehensive　performance　of　the　improved　header　is　optimum;　compared　with　the　conventional　header,　the　flow　maldistribution　parameter　S-V　the　optimum　header　decreases　by　62.2%-65.1%　and　the　effectiveness　degradation　rate　Delta　epsilon　decreases　by　91.9%-93.0%.　The　corresponding　pumping　power　P　penalty　increases　by　88.1%-　90.0%,　while　the　quantity　is　very　little　when　compared　with　the　overall　pressure　drop　of　the　heat　exchanger.　The　conclusions　in　this　paper　are　of　great　significance　in　the　optimum　design　header　of　plate-fin　heat　exchangers.